City of Moscow. Exhibits of the Museum of the Revolution, among them - burned Czech-Russian dictionary, found in 1942 in the unexploded explosive bomb, packed with sand, which pierced the roof of the Pedagogical Institute. The filmmakers are conducting an investigation, are found in Czechoslovakia with the citizens who worked during the 2nd World War German military factories involved in sabotaging the production of military equipment, ammunition, saved the Soviet prisoners of war. Interview given: Petr Hron, Edward Choc, Anna Virtova-Shtruntsova, Mary Marek. Mary Marek from the village of Gornji Eleni tells about her husband Edmund Marek, which put the Czech-Russian dictionary in the bomb with sand.